Picure Click to Picture Drag in Android Puzzle game - java

I Have tried with all possible ways which is suggested in StackOverflow
But i can't able to change from click to drag
OnTouch event is used for click.. and my images get clicked in this. and i can't able to drag and drop the image. i need to drag the image instead of clicking...
I will be much thankful to you. if you help me on this part
i have also tried this scenario's
Drag and Drop and OnClick TextView
But i didn't get any result. so please can anyone help me!!!!!!!
Can anyone help me in this ??
public class TouchListener implements View.OnTouchListener {
private float xDelta;
private float yDelta;
private PuzzleActivity activity;
public TouchListener(PuzzleActivity activity) {
this.activity = activity;
}
#Override
public boolean onTouch(View view, MotionEvent motionEvent) {
float x = motionEvent.getRawX();
float y = motionEvent.getRawY();
final double tolerance = sqrt(pow(view.getWidth(), 2) + pow(view.getHeight(), 2)) / 10;
PuzzlePiece piece = (PuzzlePiece) view;
if (!piece.canMove) {
return true;
}
RelativeLayout.LayoutParams lParams = (RelativeLayout.LayoutParams) view.getLayoutParams();
switch (motionEvent.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
xDelta = x - lParams.leftMargin;
yDelta = y - lParams.topMargin;
piece.bringToFront();
break;
case MotionEvent.ACTION_MOVE:
lParams.leftMargin = (int) (x - xDelta);
lParams.topMargin = (int) (y - yDelta);
view.setLayoutParams(lParams);
break;
case MotionEvent.ACTION_UP:
int xDiff = abs(piece.xCoord - lParams.leftMargin);
int yDiff = abs(piece.yCoord - lParams.topMargin);
if (xDiff <= tolerance && yDiff <= tolerance) {
lParams.leftMargin = piece.xCoord;
lParams.topMargin = piece.yCoord;
piece.setLayoutParams(lParams);
piece.canMove = false;
sendViewToBack(piece);
activity.checkGameOver();
}
break;
}
return true;
}
public void sendViewToBack(final View child) {
final ViewGroup parent = (ViewGroup)child.getParent();
if (null != parent) {
parent.removeView(child);
parent.addView(child, 0);
}
}
}

Related

How to stop swipe at some point in ItemTouchHelpers?

I need to swipe an item at the beginning, or did a full swipe, or stopped in current point. As in the Yandex mail. I was tring to do setLeft(dx) and setRight(dx) but that's not what I need
I have class
ItemTouchHelperCallback extends ItemTouchHelper.Callback
and inside i override method
#Override
public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
View itemView = viewHolder.itemView;
// not sure why, but this method get's called for viewholder that are already swiped away
if (viewHolder.getAdapterPosition() == -1) {
// not interested in those
return;
}
float height = (float) itemView.getBottom() - (float) itemView.getTop();
float width = height / 3;
float temdX=0;
Bitmap icon;
if(dX > 0 || lastdX>0){
//try stop item while back in dx=0, but workin only while i debug
if(lastdX>=100 && dX==0 &&lastdX!=0 &&lastdX!=-720)
{
dX=100;
isCurrentlyActive=true;
}
lastdX=dX;
itemView.setLeft((int) dX);
p.setColor(Color.GREEN);
RectF background = new RectF((float) itemView.getLeft(), (float) itemView.getTop(), dX,(float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.ic_y);
RectF icon_dest = new RectF((float) itemView.getLeft() + width ,(float) itemView.getTop() + width, (float) itemView.getLeft()+ 2*width,(float)itemView.getBottom() - width);
c.drawBitmap(icon, null, icon_dest, p);
} else if(lastdX<0 || dX<0) {
if(lastdX<=-100 && dX==0 &&lastdX!=0 &&lastdX!=720)
{
dX=-100;
//itemView.setTranslationX(-200);
isCurrentlyActive=true;
}
lastdX=dX;
itemView.setRight((int)(dX));
p.setColor(Color.RED);
RectF background = new RectF((float) itemView.getRight() + dX, (float) itemView.getTop(),(float) itemView.getRight(), (float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.ic_x);
RectF icon_dest = new RectF((float) itemView.getRight() - 2*width ,(float) itemView.getTop() + width, (float) itemView.getRight() - width,(float)itemView.getBottom() - width);
c.drawBitmap(icon,null,icon_dest,p);
}
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
I needed to do something similar and at the beginning I also thought to use the callbacks provided in the ItemTouchHelper. It turned out it's not the right approach.
If you want to stop (or in general to control) the translation of the view during the swipe, you need to be able to modify and save the value of the displacement dX. If you use the ItemTouchHelper, this value is controlled outside the available callbacks.
The solution for me was the implementation of the swipe with a custom touchListener, attached in the view holder of the recycler view. You can find an example of the basic implementation here. In case you need to consider the click on the item, remember you need to implement this in the touchListener as well.
I hope this is somehow helpful.
EDIT
Here a snippet of a custom ItemTouchListener. The listener is simplified and shows only code to handle the translation on the view during swipe. In order to stop swipe, just implement limit logic on translationX under ACTION_MOVE.
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
public class ItemTouchListener implements View.OnTouchListener {
private int mSlop;
private View mView;
private float mDownX, mDownY;
private boolean mSwiping;
private int mSwipingSlop;
private VelocityTracker mVelocityTracker;
private float mTranslationX;
public ItemTouchListener(View view) {
ViewConfiguration vc = ViewConfiguration.get(view.getContext());
mSlop = vc.getScaledTouchSlop();
mView = view;
}
#Override
public boolean onTouch(View view, MotionEvent motionEvent) {
// offset because the view is translated during swipe
motionEvent.offsetLocation(mTranslationX, 0);
switch (motionEvent.getActionMasked()) {
case MotionEvent.ACTION_DOWN: {
mDownX = motionEvent.getRawX();
mDownY = motionEvent.getRawY();
return true;
}
case MotionEvent.ACTION_UP: {
// if needed, implement part of limit swipe logic also here
if (mVelocityTracker == null) {
break;
}
mVelocityTracker.addMovement(motionEvent);
mVelocityTracker.computeCurrentVelocity(1000);
mVelocityTracker.recycle();
mVelocityTracker = null;
mTranslationX = 0;
mDownX = 0;
mDownY = 0;
mSwiping = false;
break;
}
case MotionEvent.ACTION_CANCEL: {
if (mVelocityTracker == null) {
break;
}
mVelocityTracker.recycle();
mVelocityTracker = null;
mTranslationX = 0;
mDownX = 0;
mDownY = 0;
mSwiping = false;
break;
}
case MotionEvent.ACTION_MOVE: {
if (mVelocityTracker == null) {
break;
}
mVelocityTracker.addMovement(motionEvent);
float deltaX = motionEvent.getRawX() - mDownX;
float deltaY = motionEvent.getRawY() - mDownY;
if (Math.abs(deltaX) > mSlop && Math.abs(deltaY) < Math.abs(deltaX) / 2) {
mSwiping = true;
mSwipingSlop = (deltaX > 0 ? mSlop : -mSlop);
// cancel view's touch
MotionEvent cancelEvent = MotionEvent.obtain(motionEvent);
cancelEvent.setAction(MotionEvent.ACTION_CANCEL |
(motionEvent.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));
cancelEvent.recycle();
}
if (mSwiping) {
// limit deltaX here: this will keep the swipe up to desired point
mTranslationX = deltaX;
mView.setTranslationX(deltaX - mSwipingSlop);
return true;
}
break;
}
}
return false;
}
}

ViewPager Disable Swiping

I have a ViewPager which has 3 fragments. Fragment A on the left, B in the middle and C on the right. Fragment C has a ListView which fills the whole width of the screen. I implemented a swipe listener on my ListView items using the following code:
SWIPE DETECTOR :
public class SwipeDetector implements View.OnTouchListener {
public static enum Action {
LR, // Left to Right
RL, // Right to Left
TB, // Top to bottom
BT, // Bottom to Top
None // when no action was detected
}
private static final String logTag = "SwipeDetector";
private static final int MIN_DISTANCE = 100;
private static final int VERTICAL_MIN_DISTANCE = 80;
private static final int HORIZONTAL_MIN_DISTANCE = 80;
private float downX, downY, upX, upY;
private Action mSwipeDetected = Action.None;
public boolean swipeDetected() {
return mSwipeDetected != Action.None;
}
public Action getAction() {
return mSwipeDetected;
}
#Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
downX = event.getX();
downY = event.getY();
mSwipeDetected = Action.None;
return false; // allow other events like Click to be processed
}
case MotionEvent.ACTION_MOVE: {
upX = event.getX();
upY = event.getY();
float deltaX = downX - upX;
float deltaY = downY - upY;
// horizontal swipe detection
if (Math.abs(deltaX) > HORIZONTAL_MIN_DISTANCE) {
// left or right
if (deltaX < 0) {
// Log.i(logTag, "Swipe Left to Right");
mSwipeDetected = Action.LR;
return true;
}
if (deltaX > 0) {
// Log.i(logTag, "Swipe Right to Left");
mSwipeDetected = Action.RL;
return true;
}
} else
// vertical swipe detection
if (Math.abs(deltaY) > VERTICAL_MIN_DISTANCE) {
// top or down
if (deltaY < 0) {
Log.i(logTag, "Swipe Top to Bottom");
mSwipeDetected = Action.TB;
return false;
}
if (deltaY > 0) {
Log.i(logTag, "Swipe Bottom to Top");
mSwipeDetected = Action.BT;
return false;
}
}
return true;
}
}
return false;
}}
I use it in the following way :
listView.setOnTouchListener(swipeDetector);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
final int position, long id) {
Log.d("CLICKED", "CLICKED");
if (swipeDetector.swipeDetected()) {
Log.d("SWIPING", "SWIPING");
Log.d("ACTION", swipeDetector.getAction().toString());
final Button del = (Button) view.findViewById(R.id.delete_button);
if (swipeDetector.getAction() == SwipeDetector.Action.LR) {
Log.d("LEFT TO RIGHT", "Left to right");
This works perfectly fine with Activities. However, the problem now is that when I swipe, it assumes I am swiping in the ViewPager and takes me back to the middle fragment. Is there a way to disable the ViewPager swiping on this ListView or change the focus so that this works?

How to Zoom a Text View in Scroll View?

I have seen a lots of code here which is helpful to zoom your textview but none of them work with my text because it is within scrollview. How can I get rid of this problem?
import android.app.Activity;
import android.os.Bundle;
import android.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.TextView;
public class Introduce extends Activity implements OnTouchListener{
final static float STEP = 200;
TextView mtxtRatio1,mtxtRatio2,mtxtRatio3,mtxtRatio4;
float mRatio = 1.0f;
int mBaseDist;
float mBaseRatio;
float fontsize = 13;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.introduce);
mtxtRatio1 = (TextView)findViewById(R.id.intro1);
mtxtRatio1.setTextSize(mRatio+13);
}
public boolean onTouchEvent(MotionEvent event) {
if (event.getPointerCount() == 2) {
int action = event.getAction();
int pureaction = action & MotionEvent.ACTION_MASK;
if (pureaction == MotionEvent.ACTION_POINTER_DOWN) {
mBaseDist = getDistance(event);
mBaseRatio = mRatio;
} else {
float delta = (getDistance(event) - mBaseDist) / STEP;
float multi = (float)Math.pow(2, delta);
mRatio = Math.min(1024.0f, Math.max(0.1f, mBaseRatio * multi));
mtxtRatio1.setTextSize(mRatio+13);
}
}
return true;
}
int getDistance(MotionEvent event) {
int dx = (int)(event.getX(0) - event.getX(1));
int dy = (int)(event.getY(0) - event.getY(1));
return (int)(Math.sqrt(dx * dx + dy * dy));
}
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return false;
}
}
Following is the way for implementing Pinch Zoom in TextView with/without ScrollView
MainActivity.java
public class MainActivity extends AppCompatActivity{
final static float STEP = 200;
float mRatio = 1.0f;
int mBaseDist;
float mBaseRatio;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
textViewData = (TextView).findViewById(R.id.tvContributeData);
textViewData.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View view, MotionEvent event) {
if (event.getPointerCount() == 2) {
int action = event.getAction();
int pureaction = action & MotionEvent.ACTION_MASK;
if (pureaction == MotionEvent.ACTION_POINTER_DOWN) {
mBaseDist = getDistance(event);
mBaseRatio = mRatio;
} else {
float delta = (getDistance(event) - mBaseDist) / STEP;
float multi = (float) Math.pow(2, delta);
mRatio = Math.min(1024.0f, Math.max(0.1f, mBaseRatio * multi));
textViewData.setTextSize(mRatio + 13);
}
}
return true;
});
int getDistance(MotionEvent event) {
int dx = (int) (event.getX(0) - event.getX(1));
int dy = (int) (event.getY(0) - event.getY(1));
return (int) (Math.sqrt(dx * dx + dy * dy));
}
}
}
Use Polidea's zoomview, it works in a scrollview and has pinch zoom and double tap to zoom, one thing thought, I ended up disabling the pinch zoom and just using the double tap
https://github.com/Polidea/android-zoom-view
Put your TextView andany other Views you are using into a LinearLayout that lives on a ZoomView which lives on the ScrollView, e.g.:
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.polidea.ZoomView
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/myLinearLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
</LinearLayout>
</com.polidea.ZoomView>
</ScrollView>
Hopefully this will help others. This answer is from here and here.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.tv);
tv.setText(getString(R.string.hello_world));
scaleGestureDetector = new ScaleGestureDetector(this, new simpleOnScaleGestureListener());
tv.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getPointerCount() == 1){
//stuff for 1 pointer
}else{ //when 2 pointers are present
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// Disallow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(true);
scaleGestureDetector.onTouchEvent(event);
break;
case MotionEvent.ACTION_MOVE:
// Disallow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(true);
scaleGestureDetector.onTouchEvent(event);
break;
case MotionEvent.ACTION_UP:
// Allow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
}
return true;
}
});
}
The answer from here has the problem when text is resized even fingers are static (two fingers on the screen). What I did is add a check so that the textSize do not make any changes instantly.
private float safe;
public class simpleOnScaleGestureListener extends SimpleOnScaleGestureListener {
#Override
public boolean onScale(ScaleGestureDetector detector) {
// TODO Auto-generated method stub
float size = tv.getTextSize();
Log.d("TextSizeStart", String.valueOf(size));
//float factor = detector.getScaleFactor();
float factor = Math.max(0.5f, Math.min(detector.getScaleFactor(), 2f));
Log.d("Factor", String.valueOf(factor));
float product = size*factor;
Log.d("TextSize", String.valueOf(product));
safe = Math.abs(product - size);
if(product <= 100 && product >= 20 && safe < 3){
//tv.setText("factor= " +factor + "\n" + "product = \n" + size + " * " + factor + " \n= " + product +"\n" + getString(R.string.hello_world));
tv.setTextSize(TypedValue.COMPLEX_UNIT_PX, product);
}
size = tv.getTextSize();
Log.d("TextSizeEnd", String.valueOf(size));
return true;
}
}
You can play around with safe < 3 to your desired changes value.
I'm using this solution.
Crédits for Zoom Algorithm in this vídeo
Use a TextView without ScrollView, just use android:scrollbars="vertical"
<TextView
android:id="#+id/activity_content_text_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_weight="1"
android:gravity="fill"
android:textSize="8pt"
android:scrollbars="vertical"
/>
Java:
public class MainActivity extends Activity implements View.OnTouchListener {
private TextView textContent = null;
private final static float move = 200;
private float ratio = 1.0f;
private int baseDist;
private float baseRatio;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.teste_layout);
textContent = findViewById(R.id.activity_content_text_content);
textContent.setText("Lorem ipsum dolor sit amet......");
textContent.setMovementMethod(new ScrollingMovementMethod());
textContent.setOnTouchListener(this);
}
#Override
public boolean onTouch(View v, MotionEvent event) {
return onTouchEvent(event);
}
#Override
public boolean onTouchEvent(MotionEvent event) {
if(event.getPointerCount() == 2){
int action = event.getAction();
int mainAction = action&MotionEvent.ACTION_MASK;
if(mainAction == MotionEvent .ACTION_POINTER_DOWN){
baseDist = getDisTance(event);
baseRatio = ratio;
} else {
float scale = (getDisTance(event)-baseDist)/move;
float factor = (float)Math.pow(2, scale);
ratio = Math.min(1024.0f, Math.max(0.1f, baseRatio*factor));
textContent.setTextSize(ratio+15);
}
} else {
return false;
}
return true;
}
private int getDisTance(MotionEvent event) {
int dx = (int) (event.getX(0)-event.getX(1));
int dy = (int) (event.getY(0)-event.getY(1));
return (int) (Math.sqrt(dx*dx+dy*dy));
}
}

how to set default image size in image view with zoom in zoom out?

I am using horizontal scrollview, and when I am clicking on the image buttom of horizontal scrollview, then my image is showing in the imageview. This functionality is working properly.
And in the image view I am able to zoom the image. But after zooming, when I am clicking on the next image button of scrollview then, imageview bydefault showing zoomed image. Actually it is taking zoom of previous image. So my problem is that how can I remove previous zoom, for next image. I mean next image must come with default size, not already zoomed.
Here is my code.
public class ViewButtonActivity extends Activity implements OnClickListener,
OnTouchListener {
ImageView imgView;
private ProgressDialog pDialog;
public static boolean isTouch = false;
ImageButton imgButton1, imgButton2, imgButton3, imgButton4, imgButton5;
HorizontalScrollView horizontalScrollView;
public ImageLoader imageLoader;
public static String[] imageUrl = {
"http://0-03/_cover.jpg",
"http://www.magazine.jpg",
"http://large_1.jpg",
"http://4.bp.Apr2011.jpg",
"http://www.theof.com/git.jpg" };
private int mImageHeight, mImageWidth;
private static final String TAG = "Touch";
private static final float MIN_ZOOM = 1f, MAX_ZOOM = 1f;
Matrix matrix = new Matrix();
Matrix savedMatrix = new Matrix();
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
PointF start = new PointF();
PointF mid = new PointF();
float oldDist = 1f;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_button_click_activity);
imageLoader = new ImageLoader(getApplicationContext());
imgView = (ImageView) findViewById(R.id.image_view);
imgButton1 = (ImageButton) findViewById(R.id.imageButton1);
imgButton2 = (ImageButton) findViewById(R.id.imageButton2);
imgButton3 = (ImageButton) findViewById(R.id.imageButton3);
imgButton4 = (ImageButton) findViewById(R.id.imageButton4);
imgButton5 = (ImageButton) findViewById(R.id.imageButton5);
horizontalScrollView = (HorizontalScrollView) findViewById(R.id.horizontal_scroll_view);
imageLoader.DisplayImage(imageUrl[0], imgButton1);
imageLoader.DisplayImage(imageUrl[1], imgButton2);
imageLoader.DisplayImage(imageUrl[2], imgButton3);
imageLoader.DisplayImage(imageUrl[3], imgButton4);
imageLoader.DisplayImage(imageUrl[4], imgButton5);
imgButton1.setOnClickListener(this);
imgButton2.setOnClickListener(this);
imgButton3.setOnClickListener(this);
imgButton4.setOnClickListener(this);
imgButton5.setOnClickListener(this);
mImageHeight = imgView.getWidth();
mImageWidth = imgView.getHeight();
imgView.setOnTouchListener(this);
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.imageButton1:
imageLoader.DisplayImage(imageUrl[0], imgView);
break;
case R.id.imageButton2:
imageLoader.DisplayImage(imageUrl[1], imgView);
break;
case R.id.imageButton3:
imageLoader.DisplayImage(imageUrl[2], imgView);
break;
case R.id.imageButton4:
imageLoader.DisplayImage(imageUrl[3], imgView);
break;
case R.id.imageButton5:
imageLoader.DisplayImage(imageUrl[4], imgView);
// imgView.setImageResource(R.drawable.img5);
break;
}
}
public boolean onTouch(View v, MotionEvent event) {
ImageView imgView = (ImageView) v;
imgView.setScaleType(ImageView.ScaleType.MATRIX);
float scale;
dumpEvent(event);
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN: // first finger down only
savedMatrix.set(matrix);
start.set(event.getX(), event.getY());
Log.d(TAG, "mode=DRAG"); // write to LogCat
mode = DRAG;
break;
case MotionEvent.ACTION_UP: // first finger lifted
case MotionEvent.ACTION_POINTER_UP: // second finger lifted
mode = NONE;
Log.d(TAG, "mode=NONE");
break;
case MotionEvent.ACTION_POINTER_DOWN: // first and second finger down
oldDist = spacing(event);
Log.d(TAG, "oldDist=" + oldDist);
if (oldDist > 5f) {
savedMatrix.set(matrix);
midPoint(mid, event);
mode = ZOOM;
Log.d(TAG, "mode=ZOOM");
}
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
matrix.set(savedMatrix);
matrix.postTranslate(event.getX() - start.x, event.getY()
- start.y); // create the transformation in the matrix
// of points
} else if (mode == ZOOM) {
// pinch zooming
float newDist = spacing(event);
Log.d(TAG, "newDist=" + newDist);
if (newDist > 5f) {
matrix.set(savedMatrix);
scale = newDist / oldDist; // setting the scaling of the
// matrix...if scale > 1 means
// zoom in...if scale < 1 means
// zoom out
matrix.postScale(scale, scale, mid.x, mid.y);
}
}
break;
}
imgView.setImageMatrix(matrix);
return true;
}
private float spacing(MotionEvent event)
{
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return FloatMath.sqrt(x * x + y * y);
}
private void midPoint(PointF point, MotionEvent event)
{
float x = event.getX(0) + event.getX(1);
float y = event.getY(0) + event.getY(1);
point.set(x / 2, y / 2);
}
private void dumpEvent(MotionEvent event)
{
String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE","POINTER_DOWN", "POINTER_UP", "7?", "8?", "9?" };
StringBuilder sb = new StringBuilder();
int action = event.getAction();
int actionCode = action & MotionEvent.ACTION_MASK;
sb.append("event ACTION_").append(names[actionCode]);
if (actionCode == MotionEvent.ACTION_POINTER_DOWN || actionCode == MotionEvent.ACTION_POINTER_UP)
{
sb.append("(pid ").append(action >> MotionEvent.ACTION_POINTER_ID_SHIFT);
sb.append(")");
}
sb.append("[");
for (int i = 0; i < event.getPointerCount(); i++)
{
sb.append("#").append(i);
sb.append("(pid ").append(event.getPointerId(i));
sb.append(")=").append((int) event.getX(i));
sb.append(",").append((int) event.getY(i));
if (i + 1 < event.getPointerCount())
sb.append(";");
}
sb.append("]");
Log.d("Touch Events ---------", sb.toString());
}
}
Presumably you have to reset to the original value of the Matrix which contains the current state of the transformation (which includes zoom)? I see you already keep track of the Matrix, what's standing in your way resetting it to the old value when you advance to the next image during onClick()?

Android ListView Swipe for Action like Twitter List

I'm trying to implement the "swipe for action" feature - like you can see in the "new" twitter app. A closer description you find at swipe for action description.
Now, are there any ideas/solution how to implement this feature?
Thanks!
Use a GestureDetector in each row, and wrap the row contents itself in a ViewFlipper. On a swipe, switch children of the ViewFlipper.
I have a ViewSwiper that combines a GestureDetector and ViewFlipper, but it is designed to work in either direction (e.g., from the regular row, a swipe left or right would switch to the actions), which may or may not be desirable. But, it should give you an idea of how this might work.
I did something similiar to what you need - you can find some info about there. I'm doing some manual stuff there but it works nice. For your convenience here is the code I've used:
OnTouchListener gestureListener = new View.OnTouchListener() {
private int padding = 0;
private int initialx = 0;
private int currentx = 0;
private ViewHolder viewHolder;
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
padding = 0;
initialx = (int) event.getX();
currentx = (int) event.getX();
viewHolder = ((ViewHolder) v.getTag());
}
if (event.getAction() == MotionEvent.ACTION_MOVE) {
currentx = (int) event.getX();
padding = currentx - initialx;
}
if (event.getAction() == MotionEvent.ACTION_UP ||
event.getAction() == MotionEvent.ACTION_CANCEL) {
padding = 0;
initialx = 0;
currentx = 0;
}
if (viewHolder != null) {
if (padding == 0) {
v.setBackgroundColor(0xFF000000);
if (viewHolder.running)
v.setBackgroundColor(0xFF058805);
}
if (padding > 75) {
viewHolder.running = true;
v.setBackgroundColor(0xFF00FF00);
viewHolder.icon.setImageResource(R.drawable.clock_running);
}
if (padding < -75) {
viewHolder.running = false;
v.setBackgroundColor(0xFFFF0000);
}
v.setPadding(padding, 0, 0, 0);
}
return false;
}
};

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